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Find the average height of 6 students 1m70cm, 1m25cm, 1m80cm, 1m40cm, 1m70cm and 1m45cm.

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145 cm

155 Cm

165 cm

140 cm

answer is A.

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Detailed Solution

First height of students convert into cm

1M = 100cm

1m 70cm = 1700m

145cm, 125cm, 180cm, 170cm

Average of heights

$= \frac{145 + 170 + 125 + 180 + 140 + 170}{6} = 155$

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